shudder to think

Sometimes I reply to a person's question in my head.

It's subconscious. I'm not being a horrible rude girl by not answering the question. It's just that sometimes I don't realise that I haven't said it out loud - I would mistake the voice in my head for my real voice.

It's not a good thing. Sometimes I would talk to myself / sing subconsciously because I would think that it is the voice in my head doing so.

It used to be worse, but I think it's better now (Though to be honest, I'm still not very sure because I don't realise it until someone tells me .)